#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================

import torch


def allclose(a, b, atol, ratio):
    if a.shape != b.shape:
        raise Exception("The shape of a and b must be same.")
    diff = torch.abs(a - b) > atol
    diff_count = torch.sum(diff)
    diff_ratio = diff_count / a.numel()
    return diff_ratio < ratio